Asset Catalog Format Reference: Messages Extension Icon Type

The application icons for a Messages extension.

Extension

.stickersiconset

Folder Contents

.png files for the icons for a Messages extension.

Contents.json File

Metadata and attributes for the individual icon files as shown in (Table 22-1).

**Table 22-1**Messages icon tags
Key	Type	Description
`info`	Dictionary	Versioning information for the asset catalog.
`author`	String	The application that authored the asset catalog.
`version`	Number	The version of the asset catalog.
`images`	Array of dictionaries	Each dictionary in the array is one variant of the Messages extension icon.
`filename`	String	The name of the `.png` file containing the image.
`idiom`	Slot Component	The idiom of the icon. For the values, see idiom in Image Set Type.
`size`	Slot Component	One of the sizes that matches the idiom for the icon. If the size is not valid, the image is ignored. For the values, see size below.
`scale`	Slot Component	The scale of the icon. For the values, see scale in Image Set Type.
`platform`	String	A specific platform type for images with an `idiom` of `universal`.

Values for Enumerated Tags

idiom

See idiom in Image Set Type.

platform

Used for an image that is targeted for a specific platform when the idiom is universal Table 22-2. For example, an image that is targeted for all iOS devices but not for macOS, tvOS, or watchOS devices.

**Table 22-2**platform values
Value	Description
ios	Devices running iOS, such as iPhone and iPad.
macos	Devices running macOS, such as MacBook Pro.
tvos	Devices running tvOS, such as Apple TV
watchos	Devices running watchOS, such as Apple Watch.

size

The size of the Messages app icon in points. Also see Points Versus Pixels (Table 6-2).

**Table 22-3**`size` values
Value	Description
`29x29`	An iPhone or iPad settings icon.
`60x45`	A Messages extensions icon for iPhone indicated by "C" in Figure 22-1.
`67x50`	A Messages extensions icon for iPad indicated by "C" in Figure 22-1.
`74x55`	A Messages extensions icon for iPad Pro indicated by "C" in Figure 22-1.
`27x20`	A Messages breadcrumb icon indicated by "A" in Figure 22-1.
`32x24`	An icon used to identify the Messages app in individual messages indicated by "B" in Figure 22-1.
`1024x768`	An icon for the App store and Messages App store.

scale

See scale in Image Set Type.

Sample Contents.json File

        {
   "images" : [{
      "size" : "60x45",
      "idiom" : "iPhone",
      "filename" : "MyStickerPackIcon_60x45@2x.png",
      "scale" : "2x"
   },
   {
      "size" : "60x45",
      "idiom" : "iPhone",
      "filename" : "MyStickerPackIcon_60x45@3x.png",
      "scale" : "3x"
   },
   {
      "size" : "67x50",
      "idiom" : "iPad",
      "filename" : "MyStickerPackIcon_67x50@2x.png",
      "scale" : "2x"
   },
   {
      "size" : "74x55",
      "idiom" : "iPad",
      "filename" : "MyStickerPackIcon_74x55@2x.png",
      "scale" : "2x"
   },
   {
      "size" : "27x20",
      "idiom" : "universal",
      "filename" : "MyStickerPackIcon_27x20@2x.png",
      "scale" : "2x"
      "platform" : "ios"
   },
   {
      "size" : "27x20",
      "idiom" : "universal",
      "filename" : "MyStickerPackIcon_27x20@3x.png",
      "scale" : "3x"
      "platform" : "ios"
   },
   {
      "size" : "32x24",
      "idiom" : "universal",
      "filename" : "MyStickerPackIcon_32x24@3x.png",
      "scale" : "3x"
      "platform" : "ios"
   },
   {
      "size" : "1024x768",
      "idiom" : "ios-marketing",
      "filename" : "MyStickerPackIcon_ios-marketing.png",
      "scale" : "1x"
      "platform" : "ios"
   }],
   "info" : {
      "author" : "com.developerName",
      "version" : 1
   }
}

      